Machine for making corner mounts



Oct. 23, 1951 G. STOKINGER 2,572,673

MACHINE FOR MAKING CORNER MOUNTS Filed Oct. 2, 1947 3 Sheets-Sheet l Oct. 23, 1951 G. STOKINGER 2,572,673

MACHINE FOR MAKING CORNER MOUNTS Filed 001;. 2, 1947 s Sheets-Sheet 2 II/II II/III! 'r fizz Z2 6)??? jfl av up a) L11! 14/44/ i! J JAIL! I J:

Oct. 23, 1951 G. STOKINGER 2,572,673

MACHINE FOR MAKING CORNER MOUNTS I Filed Oct. 2, 1947 3 Sheets-Sheet 3 64 I if if if v r \I M /fl in 4 /Z M //f m III/Ill,

Patented Oct. 23, 1951 MACHINE FOR MAKING CORNER MOUNTS George Stokinger, Wakefield, Mass, assignor to Ace Art Company, Reading, Mass., a corporation of Massachusetts Application October 2, 1947, Serial No. 777,452

7 Claims.

This invention relates to machines for makin mounting corners for photographs, cards, and the like, and has for an object to produce such corners from a pair of elements cut from two strips of stock, one, a cap element, having adjacent corners folded toward each other and secured to the flat face of the other or base element cut from the other strip. Such a corner mount is well adapted to have the cap element formed of transparent material such as cellophane, though it is not limited to the use of such material.

One object of the present invention is to provide mechanism by which the cap element is firmly held while it is severed from the cap strip and folded in position to be secured to the base element.

A further object is to provide simple and effective means for removing the completed mount from the machine.

Still another object is to provide a machine in which the corners of the cap element are folded into slightly overlapping relation so that there is no space therebetween for the passage of adhesive which might contact with the photograph or other element to be held thereby during use of the mount.

Further objects of the invention are to provide improved actuating mechanism for the various operating parts whereby the various functions of the machine are performed accurately and rapidly.

Further objects and advantages will appear from a description of an embodiment of the invention shown in the accompanying drawings in which Figure 1 is a front elevation of the upper portion of a machine embodying the invention.

Figure 2 is a fragmentary view partly in side elevation and partly broken away and in section on the forward portion of the machine.

Figure 3 is a horizontal sectional view on line 33 of Figure 1.

Figures 4 to 7, inclusive, are detail sectional views on the correspondingly numbered section linesof Figure 3.

Figure 8 is a detail sectional view on line 88 of Figure 7.

Figures'9, 12 and 13 are views similar to a portion of Figure 7, but showing parts in different portions of the cycle of operations of the machine.

Figures 10 and 11 are detail sectional views on lines III-I and II--I I, respectively, of Figure 9.

Figure 14 is an exploded perspective view of the two elements of which the mount is composed.

Figure 15 is a perspective view of a completed mount.

Referring to the drawings at I is indicated the platform of a press by which the parts of the corner mount are cut and secured together. This Platform or table I is supported on suitable legs 2 and has upstanding therefrom frame portions supporting for vertical reciprocatory motion a punch plunger 4. The upper end of this plunger 4 is connected by a pivoted connecting rod 5 to a crank arm 6 carried by a horizontal shaft 1 having at one end a suitable driving means such as a belt pulley 8 and a fly wheel 9. To the lower end of the plunger 4 may be secured a punch, which by the rotation of the shaft I is vertically reciprocated and is effective to punch a base strip from a strip of material and apply it to the folded-in corners of a cap strip as will later appear.

The mechanism for feeding and supporting the relatively narrow cap strip I0 (see particularly Figures 3 and 8 to 13) is carried by the table portion I. The cap strip III is relatively narrow and may well be of transparent material such as thin cellophane, though it is not restricted to any particular material. It is fed to the operative mechanism of the machine by the feed mechanism shown best in Figure 8, and which includes a lower smooth feed roll II which projects up through a slot I2 in a supporting plate I3 over which the strip Ill passes. By reason of the slot I2, the periphery of the roll II is brought up to engage the under face of the strip I0.

Cooperating with this roll II to feed the strip is a top feed roll I4 carrying a feed cam element I5. This element I5 may be pivotally supported at its forward end as on the pivot I6, and its opposite end may be pressed outwardly from the periphery of the roll I4, as by a spring H, the parts being so arranged that when the cam I5 is downwardly positioned with reference to its supporting shaft 20, the cam I5 presses the strip I0 against the roll II, and by so engaging the strip I0 therebetween it is fed forward intermittently by rotation of the cam I5. During the time that the cam is out of engagement with the strip II], this strip is held against retrograde motion by means of a pivoted dog 25 having a foot portion 26 normally pressed against the strip III as by a leaf spring 21. Any tendency of the strip I0 to be pulled backwardly acts to tighten the grip of the dog 25 thereagainst, clamping it firmly to the plate l3, but any motion in the forward direction merely swings the dog 25 for wardly out of clamping engagement. The strip I is held against endwise motion between intermittent feeding actions by the clamping finger 28 which extends through a suitable opening in a guide plate 29, this finger being rocked into or out of Contact with the strip I9 by a, cam mechanism which will later be described.

Since the cam 15 occupies but a portion of the circumference of the roll it, this feed of the strip I0 is intermittent, being accomplished only during that part of the revolution of the shaft 20 that the cam l engages the strip. This strip is thus fed intermittently forwardly, bringing its forward end portion over an anvil plate 35 (see Figures '7, 8 and 1D). This anvil plate 39, which is stationary, has a pair of angularly related upstanding edges 3| and 32, the angular relation being 90, but the strip 19, the forward end of which is at right angles to its length, passes over these walls 3| and 32 to the forward edge of the anvil plate 39. The edges 38 and 32 thus cross diagonally beneath the strip 50 substantially from one side to the other thereof.

Overlying the anvil plate 39 is a spring presser plate 35, which as shown best in Figure '7, is secured as by a rivet 36 at its rear end to the anvil plate 30. Its forward end terminates in a pair of angularly related edges mating the upstanding walls 31 and 32 of the anvil plate and spaced inwardly therefrom sufficiently for the material of the strip [0 to pass up therebetween. At the back edge of the anvil plate 39 is positioned a cutting knife 3! (see Figures 3, 6, 8 and After each intermittent feed of the strip [9 over the anvil plate, the knife 3? is actuated by a cam 38 (see Figures 3 and 6) carried by a rotary shaft 39. This cam acts upon a follower roll 49 pivoted within a slot 41 at the rear end of the knife 31, this knife being fulcrumed on the pivot pin 42. The piece of the strip [9- thus cut off lies between the anvil plate 30 and the presser plate 35 as shown in Figure '7 at 45 and immediately the forward end of the pressr plate 35 is depressed by the action of a presser foot 46, forcing the central portion of the piece 45 down between the upstanding walls 3| and 32, as shown in Figures 9 and 11, thus lifting adjacent corner portions 41 andAB of the piece 45. intoithe position shown in Figure 11 between the edges of the .presser plate 35 and the walls 3! and 32-. These corner portions 41 and 48 extend substantially throughout the length of the cut piece. With the parts in this position, a folder 59 having its forward end cut to present a pair of right angularly related inwardly extending edges 5| and 52 (see Figure 10) is moved laterally from the position shown in Figures 9 and 10 to the position shown in Figure 12 across the upstanding edges 41 and 48, folding the corners down over the presser plate 35. By positioning one of the edges 5| or 52 slightly in advanced the other, one of the corners 41 or 48 is folded inwardly of the other. The top member is thus folded into the form shown for the cap element A of Figure 14 with its side edges 55 and 56 in' overlapping relation, the cap element now being held on the forward end of the presser plate 35. This foot 45 which depresses the forward end of the presser plate 35 from its normally slightly elevated position is shown in Figure. .7, and is at the inner end of a lever 69, f ulcrumed on the pivot pin, 6l (see Figures 3 and 7) the outer end of the lever having journaled in a slot 64 therein a follower roll 62, which is actuated by a cam 63 carried by the shaft 39.

The motion of the folder 50, as shown best in Figures 3 and 7, is produced by a cam 10 (see Figure '7) fixed to a shaft H. This shaft 1| rotates in the direction shown by the arrow and at suitable times an arm '12 thereon impinges on a lug l3 upstanding from the outer end of the folder 50 and pushes this folder forwardly to effect the folding operation. As the arm 12 continues its rotation and slips by the lug 13 it engages one arm M of a dog fulcrumed on the shaft 16 and rocks this dog in a direction to bring a second arm ll of this dog against the inner face of the lug 73, causing this lug 13 to be pushed backwardly, retracting the folder 50. As there is sometimes a tendency for the folded cap element A to become caught in the apex between the folding edges 5| and 52, a spring finger 13 may be provided having an tip-turned inner edge portion 19 lying within the apex between the edges 5! and 52. In the retractedposition of the folder, this end 19 is pressed up into a slot Blin a plate 82 which forms the cover for the guideway in which the folder 50 is slidably guided in the position shown in Figure 12. In the positions of Figures 9 and 13, it is allowed to spring downwardly, dislodging the cap element should it have become caught in the folder.

The shaft 1| which actuates the folder also carries a cam 85 (see Figure 4) which acts on a follower roll 89 pivoted in a slot in the outer end of the finger 28, this finger 28 thus being actuated by the cam 85. The shaft H on its rear end. carries a spiral gear 83 meshing with a similar gear on the shaft 59. This shaft 8 9 is connected through a pair of mating spiral gears 90 with the shaft 39 and also has fixed thereto a gear 92 which drives the feed shaft 20 through an idler gear 93 and a gear 94 fixed to'the feed shaft 20. The shaft 89 also carries aspiral gear 9'! which meshes with a spiral gear 98 'on a vertical-shaft 99 which is connected through meshing spiral gears I00 with the drive shaft 1.

While the cap element A is retained on .th end of the presser plate 35, a base element having anactivated adhesive coated portion is presented to the folded-in corners 55 and '56 and secured by the adhesive thereto. The base elements are punched from a strip H9 shownbest in Figure 8. This strip H0 is positioned above the strip l0 and passes down over a guide bar IH fixed to the machine frame at its rear end an down to and through a slot H2 of a punching anvil H3. It may be fed forwardly intermittently by pawl and ratchet driven feed rolls H9 (see Figures 1 and.2) actuated by a crank H93 and connecting rod H9! from the main drive shaft 6. 7

As shown best in Figures 9 to 13, the slot H2 in the anvil is formed between a base member H4 and a top member H5 superposed-thereon and provided with a thickened portion H6 which bears directly against the member H4 and lifts the remainder of the top element out of contact therewith. The top member H5 is provided with a flange H! which extends down- Wardly slightly below the top edge of the member H4. These members H4 and H5 are provided with mating die openings H8 for the passage of the punch I29. The strip H9 is somewhat wider than the die. opening H8 so that the margins of the base stripare supported .on the member H4 and on descent of the punch I20, a base element B of the shape shown in the upper portion of Figure 14 is punched from the strip 0. ment B has an extension I22 beyond the inner edge of the cap element A. Its top face is coated with an adhesive throughout its complete area, but this adhesive is not activated until such time as it is desired to use the corner mount and is then used to secure the-mount in its position of use. The under face of the strip III] is coated with an adhesive from the outer corner I23 of the base B substantially half way across, or to the dotted line I24 shown in Figure 14. Not only is this portion of the under face of the strip adhesive coated, but this coating activated before the strip IIO reaches its position beneath the punch. This activating means may comprise any suitable moistening device (not shown) located in its path of motion. Such a device, for example, is shown in the Riley Patent No. 1,627,667 granted May 10, 1927, for Machine for Making Corner Mounts, this machine, however, being employed to make a corner mount of different construction from that here illustrated.

The parts are so timed that on the retraction of the folder 50, leaving a folded cap element on the extremity of the presser plate 35, the punch I20 descends through the anvil block, punches a base member B therefrom and presents it with its activated adhesive coating against the folded-in corners 55 and 56 of the cap element A, thus uniting these parts to form the completed corner mount such as is shown in Figure 15. In order to insure proper presentation of the base element B as cut out by the punch, this punch I20 is shown as provided with a longitudinal passage which, as shown best in Figure 1, may be connected through a flexible pipe or hose I3I with the upper portion of a cylinder I32 within which rides a plunger I33. This plunger I33 is secured to a bracket I43, which, in turn, is secured to the plunger 4, so that as the plunger 4 and the punch descends, the plunger I33 is partly withdrawn from the cylinder I32 thus,

creating a suction effect in the passage I30 which holds the punching against its under face.

and insures its correct presentation against the cap member. suction effect is reversed so that the base member B is forcibly removed from the end of the punch. I

The presentation of the punching or base member B in condition to adhere to the in-turned corners 55 and 56 of the cap A completes the formation of the corner element. It will be noted, however, that this corner element has been made up while the cap engages the end of the presser member 35. fore provided for ejecting this corner'cap from the end of the presser member 35 after the base member has been applied. To this end, a slide I40 is mounted for sliding motion in a guide I4I carried by the table I. This slide I40 has a backwardly directed flange I42 formed with a knife-shaped head I43 positioned at right angles to the length of the slide I40. This head I42 has a forwardly extended blade I44 at its outer end arranged generally parallel to the strip I0, and so positioned opposite to the punch opening I I8 that as this plate element I44 is moved to the left as viewed in Figures 3 and 5, it will engage, wipe off and discharge from the presser plate 35 the completed corner. This It will be noted that this ele- I 30 therethrough On lifting of the plunger 4, the

Means are there-" slide I is reciprocated at suitable times by therotation of the shaft 39 which has fixed thereon a dog I (see Figure 5). tates clockwise, the arm I50 engages on the, rear face of a lug I5I upstanding from the mem-. ber I40, so that as the shaft I39 continues to rotate, the dog I50 contacts that portion of the slide to force the slide to the left. After the dog I50 slips away from the lug I5I, it contacts a face I52 of a dog I53 fulcrumed at I54, and rocks this dog I53 in counterclockwise direction, thus swingin its arm I55 in counterclock wise direction to impinge on the inner face'of. the slide lug I5I. As the dog I53 continues to rock, it retracts this lug I5I and the. ejector slide preparatory to another ejecting action. When the mounts are thus ejected, they arepushed into the upper end of a discharge passage I which leads down through the table I of the machine and to a suitable container.

(not shown).

In order to insure the ejection of the. corners through the discharge passage I60, an air jet pipe I86 deriving compressed air from a suitable source leads down between the ejector knife blade I42 and the discharge passage I60 and a jet of air from this pipe discharged under control of a valve I850 actuated by a cam I 86I on the shaft 39 blows the .corners from the presser plate through the discharge passage I60. From this discharge passage I60, the corners as they are made pass out through a hood I8! and to the. top face of a conveyor belt I82 (see Figure2). This belt leads through the nip between a pair of pressure rolls I83 and I84 which serves toroll the cap and base of each mount togethen'insuring a good bond between them by the adhesive, The completed mounts on the belt then pass over a board I where they are discharged, the belt leading back over stretcher bars I9I and I92 and beneath the hood I 81 where the corner mounts are deposited thereon. The presser rolls I83 and I84 are driven in time with the operation of the machine, as by a chain drive I95 driven: by belt I96 from a pulley on the shaft 6.

From the foregoing description of an embodie ment of this invention, it should be evident to those skilled in the art that various changes and modifications might be made without departing from the spirit Or scope of the invention. 1

I claim: i

1. "A machine of the class described, comprising means for feeding a relatively narrow cap strip endwise, an anvil across which said strip is fed and having a pair of angularly related up standing edges both extending inwardly from the Same side edge of said strip to the opposite side edge, a presser plate having an end tapered to mate the angularity of said upstandin'g'ed'ges; means for cutting off said cap strip at the front edge of said anvil and adjacent to one end of one only of said upstanding edges to form a cap element overlying said anvil, means pressing said plate toward said anvil to lift adjacen't'corners of said element for the full'length of said ele-'' ment between said edges and said tapered end, a folding plate having a notch in its forward face, means for reciprocating said folding plate with its notched face across said presser plate to fold said lifted corners against said presser plate. and means f'or cutting and impressing on said folded corners a-base element having an activated lad hesive face to secure said cap and base elements together.

2. A machine of the class described, compris- As the shaft I39 roing means for feeding a relatively narrow cap strip endwise, an anvil across which said strip is fed and having a pair of angularly related upstanding edges both extending inwardly from the same side edge of said strip, a presser plate having an end tapered to mate the angularity of said upstanding edges, means for cutting oif'said cap strip at the front edge of said anvil adjacent to one only of said upstanding edges to form a cap element overlying said anvil, means pressing said plate toward said anvil to lift adjacent corners of said out element between said edges and said tapered end, a folding plate having a notch in its forward face, means for reciproeating said folding plat across said presser plate and laterally of'said feed direction to cause said notched face to fold said lifted corners against said presser plate, means for cutting and impressing on said folded corners a base element extending beyond one side edge of said strip having an activated adhesive face to secure said cap and base elements together, and means for then freeing said cap element from said presser plate.

3. A machine of the class described, comprising means for feeding a relatively narrow cap strip endwise, an anvil across which said strip is fed' and having a pair of angularly related upstanding edges extending inwardly from one edge of said strip, a presser plate having an end tapered to mate the angularity of said upstanding-edges, means for cutting off said capstrip at the-front edge of said anvil to form a cap element overlying said anvil, means pressing said plate toward said anvil to lift adjacent corners of said element between said edges and said tapered end, a folding plate, means for reciprocating said folding plate across said presser plate to fold said lifted corners'against said presser plate, means 'for cutting and impressing on said folded corners a base element having an activated adhesive face to secure said cap and base elements together, a wiper, and means for reciprocating said Wiper along said presser plate to free the'completed corner mount therefrom.

4. A machine of the class described, comprising means for feeding a relatively narrow cap strip endwise, an anvil across which said strip i'stfed and having a pair of angularly related upstan'dingedges extending inwardly from one edge of said strip, a presser plate having an end tapered to mate the angularity of saidtupstanding edges, means for cutting off said cap strip at the front edge of said anvil to form a cap element overlying said anvil, means pressing said plate toward said anvil to lift adjacent corners, of said out element between said edges and said tapered end, a folding plate having a rectangular notch in its forward face, means for reciprocating said folding plate across said presser plate with one of said notch edges slightly in advance of the other and folding one of said corners in overlapping relation to the other corner to fold said lifted corners against said presser plate, and means for cutting and impressing on said folded corners a base element having an activated adhesive face to secure said cap and base elements together.

5. A machine of the class described, comprising a stationary anvil having a pair of angularly related upstanding edges at one side and a straight opposite edge, means for feeding a relatively narrow cap strip endwise across said anvil,

means for cutting off said strip at the front edge of said anvil adjacent to one only of' said upstanding edges, a presser plate having an end tapered to mate the angularity of said upstand ing edges, means pressing said plate toward said anvil to lift adjacent corners of said out element between said upstanding edges and said tapered end, means for folding said corners over said presser plate to form a cap element, means for cutting and impressing on said folded corners a base element having an activated adhesive face to secure said cap and said base elements together, and means for ejecting said elements from said presser plate.

6; A machine of the class described, comprising a stationary anvil having a pair of angularly related upstanding edges at one side and a straightopposite edge, means for feeding a relatively narrow cap strip endwise across said anvil, means for cutting off said strip at the front edge of said anvil adjacent to one only of said upstanding edges, a presser plate having an end tapered to mate the angularity of said upstanding edges, means pressing said plate toward said'anvil to lift adjacent corners of said out element between said upstanding edges and said tapered end, means for folding said corners over said presser plate to form a cap element, means for cutting and impressing on said folded corners a base element having an activated adhesive face to secure said cap and said base elements together, and means reciprocating lengthwise 'of said-cap strip for ejecting said elements from said presser plate.

'7. A machine of the class described, comprising means for feeding a relatively narrow cap strip endwise, an anvil across which said strip is fed and having a pair of angularly related upstanding edges both extending inwardly from one side edge of said strip, a presser plate having an endtapered to mate the angularity of said upstanding edges, means for cutting off said cap strip at the front edge of said anvil adjacent to one only of said upstanding edges to form a cap elementoverlying said anvil, means pressing said plate toward said anvil to lift adjacent corners of said out element between said edges and said tapered end, a folding plate having a notch in its forward face, means for reciprocating said folding plate laterally of the length of said strip across said presser plate to cause said notched face to fold said lifted corners against said presser plate into marginal lapping rela.-' tion, a spring movable into the apex of said notch on retraction of said folding plate to insure dislodgement of a cap element therefrom at such retraction, and means for cutting and impressing on said folded corners a base element extending beyond the side edge of said cap and having an activated adhesive face to secure said cap and base elements together.

GEORGE STOKINGER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,451,610 Gestas Apr. 10, 1923 1,627,667 Riley May 10, 1927 2,076,079 Gammeter Apr. 6, 193 7 

